1.

……………………… reaction obeys the expresison `t_(1//2) = 1//ka` in chemical kinetics.A. `1`B. `0`C. `3`D. `2`

Answer» Correct Answer - D
`t_(1//2) = (1)/(Ka)` for second order reactions.
`t_(1//2) = (1)/(K(a)) rArr t_(1//2) prop (1)/([a]^(1))`
`rArr t_(1//2) prop [a]^(-1)`
Also,
`t_(1//2) prop [a]^(1-n)`
`[a]^(n-1) = [a]^(-1) rArr 1 - n = -1`
`n = 2`


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